Pencil.



No. 732,210. PATENTED JUNE 30, 1903.

F. W. MUSSON.

PENCIL.

APPLICATION FILED 00T. 12, 1900.

N0 MODEL.

zve 70507 Tm; Nonms paens co, Pnouuwo, wAsnlNcToN. u, c,

UNTTED STATES Patented June 30, 1903.

PATENT OFFICE.

PENCIL.

SPECIFICATION forming part of Letters Patent N0. 732,210, dated June 30, 1903. Application staccata i2, 1900. seria No. 32,328. (Nomad.)

To a/ZZ whom, it may concern:A

Beit known that I, FREDERICK W. MUssoN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain newand useful Improvement in Pencils, of which the following is a specification.

My invention relates lo lead-pencils, and has for its object to provide certain new and useful improvements in connection with pencils having removable lead. My improvements are illustrated in the accompanying Figure l is a longitudinal cross section through one form of my device, showing the several parts in position. Fig. 2 is a side view of the same with the parts separated. Fig. 3 is a longitudinal section through a somewhat similar form of the device.

Like parts are indicated by the same letter in all of the gures.

A is the lead-pencil handle, hollowfor a portion of its length to receive the lead suitably formed or proportioned and externally screwthreaded to be received into the removable tip portion B.

C is the screw-threaded lead, and C a similar lead not screw-threaded.

D is the sharpened tip of the lead, and E is a conically-shaped washer adapted to fit in the tip B and when the parts are in position to be securely clamped in place bythe engagement of the end F of the handle A. This washer E is preferably made of some iibrouslike or flexible or yielding substance which will without the previous preparation of an internal thread receive the thread of the lead and when held in place, as indicated by Fig. 1, will cause such lead to travel longitudinally when it is turned about its axis, the thread of the lead acting to produce that effect on the inside of such washer. E is a similar washer to receive the non screwthreaded lead C. In this case the texture of the washer E' must be such, or the pressure with which it is clamped into position must be such, or the coating or outer'finish of the non-screw-threaded lead C must be such, that one or all of these characteristics-will' cause the lead to be sufficiently firmly held in position to bring about the desired result. The

washers may be made in sections, although a single washer is suicient.

In the use of the pencils either lead can be moved in or out by catching hold of its outer end and either turning or pushing or pulling it, as the case may be, or the detachable handle may be unscrewed and the lead manipulated by taking hold of the other end of it. Of course the removable handle can be secured to the tip in any manner, it only being necessary to have it removable.

I have not wished to limit myself bythe use of the form lend or any particular substance, but mean, broadly, any material for marking. Neither do I wish to be understood as limiting myself as to any particular washer. It is only necessary that the washer and the tip should be so related that the washer is contractive when forced into position so far as it may be necessary to enable it to clamp the lead.

The use and operation of myinvention will be quite apparent from what has already been said; but it may be well to explain that it is my purpose to sell leads for refilling the pencils equipped each with a washer, so that a new and strong grip elfect will be obtained with each new lead. It is also my purpose to have roomin the handle of the pencil for one or more leads, and these can be used when necessary, according to the construction used in any given case, to push down the lead in actual use. I would further` explain that with the first form of pencil shown it is probably more convenient to move the lead in and out by holding and turning the tip of the same, Whereas in the second form it would be more convenient to remove the handle and manipulate the lead at the inner end.

Iclaim- In a lead-pencil, the combination of an exterior conical tip, screw-threaded at itsupper end, with a handle part screw-threaded to engage the screw-threaded upper end of the conical tip, said tip having a large internal aperture and the handle part having a longitudinal internal aperture larger in cross-section than the lead, a removable screw-threaded lead, and an elastic packing material, into which the screw-thread on the lead takes, shaped so as to tit within the conical tip, and

having an aperture which is smaller than the by the rotation of the handle part surroundcross-seotion of the lead, so that the lead is ing it.

always 0ripped by the packnor and when turned vill travel forward and when the han- FREDERICK W' MUSSON 5 dle is screwed into the conical tip the paoking is compressed about the lead so as to hold it moresecu rely, while the lead is not rotated Witnesses:

FRANCIS W. FRIGOUT, H. D. JAMESON. 

